Import time-macros-impl-0.1.1
Bug: 169611678
Test: make
Change-Id: Iff0cba9b9681f211c42fffa7e44043353226fb93
diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
new file mode 100644
index 0000000..347708d
--- /dev/null
+++ b/.cargo_vcs_info.json
@@ -0,0 +1,5 @@
+{
+ "git": {
+ "sha1": "0701287eb68bbf2ec1f3b8e8012d577ddaf90938"
+ }
+}
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..0d11564
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,43 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+edition = "2018"
+name = "time-macros-impl"
+version = "0.1.1"
+authors = ["Jacob Pratt <the.z.cuber@gmail.com>"]
+description = "Procedural macros for the time crate."
+readme = "../README.md"
+keywords = ["date", "time", "calendar", "duration"]
+categories = ["date-and-time"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/time-rs/time"
+
+[lib]
+proc-macro = true
+[dependencies.proc-macro-hack]
+version = "0.5"
+
+[dependencies.proc-macro2]
+version = "1"
+
+[dependencies.quote]
+version = "1"
+
+[dependencies.standback]
+version = "0.2"
+default-features = false
+
+[dependencies.syn]
+version = "1"
+features = ["proc-macro", "parsing", "printing", "derive"]
+default-features = false
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
new file mode 100644
index 0000000..3ef79fc
--- /dev/null
+++ b/Cargo.toml.orig
@@ -0,0 +1,22 @@
+[package]
+name = "time-macros-impl"
+version = "0.1.1"
+authors = ["Jacob Pratt <the.z.cuber@gmail.com>"]
+edition = "2018"
+repository = "https://github.com/time-rs/time"
+keywords = ["date", "time", "calendar", "duration"]
+categories = ["date-and-time"]
+readme = "../README.md"
+license = "MIT OR Apache-2.0"
+description = "Procedural macros for the time crate."
+
+[dependencies]
+proc-macro2 = "1"
+# I'm not entirely sure why `derive` is necessary here, but it fails without it.
+syn = { version = "1", default-features = false, features = ["proc-macro", "parsing", "printing", "derive"] }
+quote = "1"
+proc-macro-hack = "0.5"
+standback = { version = "0.2", default-features = false }
+
+[lib]
+proc-macro = true
diff --git a/LICENSE b/LICENSE
new file mode 120000
index 0000000..a1c76e3
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1 @@
+LICENSE-Apache
\ No newline at end of file
diff --git a/LICENSE-Apache b/LICENSE-Apache
new file mode 100644
index 0000000..3d2fb46
--- /dev/null
+++ b/LICENSE-Apache
@@ -0,0 +1,202 @@
+
+ Apache License
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+ http://www.apache.org/licenses/
+
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+ APPENDIX: How to apply the Apache License to your work.
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+ Copyright 2019 Jacob Pratt
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+ Licensed under the Apache License, Version 2.0 (the "License");
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diff --git a/LICENSE-MIT b/LICENSE-MIT
new file mode 100644
index 0000000..1ddffb9
--- /dev/null
+++ b/LICENSE-MIT
@@ -0,0 +1,19 @@
+Copyright (c) 2019 Jacob Pratt
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..32aebc6
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,19 @@
+name: "time-macros-impl"
+description: "Procedural macros for the time crate."
+third_party {
+ url {
+ type: HOMEPAGE
+ value: "https://crates.io/crates/time-macros-impl"
+ }
+ url {
+ type: ARCHIVE
+ value: "https://static.crates.io/crates/time-macros-impl/time-macros-impl-0.1.1.crate"
+ }
+ version: "0.1.1"
+ license_type: NOTICE
+ last_upgrade_date {
+ year: 2020
+ month: 10
+ day: 21
+ }
+}
diff --git a/MODULE_LICENSE_APACHE2 b/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/MODULE_LICENSE_APACHE2
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..46fc303
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1 @@
+include platform/prebuilts/rust:/OWNERS
diff --git a/src/date.rs b/src/date.rs
new file mode 100644
index 0000000..d246579
--- /dev/null
+++ b/src/date.rs
@@ -0,0 +1,92 @@
+use crate::{
+ ext::LitIntExtension,
+ time_crate,
+ time_crate::{days_in_year, days_in_year_month, weeks_in_year},
+};
+use proc_macro2::TokenStream;
+use quote::{quote, ToTokens};
+use syn::{
+ parse::{Parse, ParseStream},
+ Ident, LitInt, Result, Token,
+};
+
+pub(crate) struct Date {
+ year: i32,
+ ordinal: u16,
+}
+
+impl Parse for Date {
+ fn parse(input: ParseStream<'_>) -> Result<Self> {
+ let (year, year_span) = {
+ let year_sign = if input.peek(Token![+]) {
+ input.parse::<Token![+]>()?;
+ 1
+ } else if input.peek(Token![-]) {
+ input.parse::<Token![-]>()?;
+ -1
+ } else {
+ 1
+ };
+ let year = input.parse::<LitInt>()?;
+ (year_sign * year.value::<i32>()?, year.span())
+ };
+ input.parse::<Token![-]>()?;
+
+ // year-week-day
+ let (year, ordinal) = if input.peek(Ident) {
+ let week = {
+ let week = input.parse::<Ident>()?;
+ let week_str = week.to_string();
+ if week_str.starts_with('W') {
+ LitInt::new(&week_str[1..], week.span())
+ } else {
+ return error!(week.span(), "expected week value to start with `W`");
+ }
+ };
+ input.parse::<Token![-]>()?;
+ let day = input.parse::<LitInt>()?;
+
+ week.ensure_in_range(0..=weeks_in_year(year) as isize)?;
+ day.ensure_in_range(1..=7)?;
+
+ time_crate::Date::from_iso_ywd_unchecked(year, week.value()?, day.value()?).as_yo()
+ }
+ // year-month-day
+ else if input.peek2(Token![-]) {
+ let month = input.parse::<LitInt>()?;
+ input.parse::<Token![-]>()?;
+ let day = input.parse::<LitInt>()?;
+
+ month.ensure_in_range(1..=12)?;
+ day.ensure_in_range(1..=days_in_year_month(year, month.value()?) as isize)?;
+
+ time_crate::Date::from_ymd_unchecked(year, month.value()?, day.value()?).as_yo()
+ }
+ // year-ordinal
+ else {
+ let ordinal = input.parse::<LitInt>()?;
+ ordinal.ensure_in_range(1..=days_in_year(year) as isize)?;
+ (year, ordinal.value()?)
+ };
+
+ // TODO(upstream) Swap out the following when dtolnay/syn#748 is
+ // published on crates.io. Be sure to update Cargo.toml for the minimum
+ // version.
+ // LitInt::create(year).using_span(year_span).ensure_in_range(-100_000..=100_000)?;
+ if year < -100_000 || year > 100_000 {
+ return error!(year_span, "value must be in the range -100_000..=100_000");
+ }
+
+ Ok(Self { year, ordinal })
+ }
+}
+
+impl ToTokens for Date {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ let Self { year, ordinal } = self;
+
+ tokens.extend(quote! {
+ ::time::internals::Date::from_yo_unchecked(#year, #ordinal)
+ })
+ }
+}
diff --git a/src/ext.rs b/src/ext.rs
new file mode 100644
index 0000000..abdf0b8
--- /dev/null
+++ b/src/ext.rs
@@ -0,0 +1,48 @@
+use proc_macro2::Span;
+#[allow(unused_imports)]
+use standback::prelude::*;
+use std::{
+ fmt::{Debug, Display},
+ ops::RangeBounds,
+ str::FromStr,
+};
+use syn::{LitInt, Result};
+
+pub(crate) trait LitIntExtension {
+ fn create<T: Display>(value: T) -> Self;
+ fn with_span(self, span: Span) -> Self;
+ fn ensure_in_range(&self, range: impl RangeBounds<isize> + Debug) -> Result<()>;
+ fn value<T: FromStr + Display>(&self) -> Result<T>
+ where
+ T::Err: Display;
+}
+
+impl LitIntExtension for LitInt {
+ fn create<T: Display>(value: T) -> Self {
+ Self::new(&value.to_string(), Span::call_site())
+ }
+
+ fn with_span(mut self, span: Span) -> Self {
+ self.set_span(span);
+ self
+ }
+
+ #[allow(unstable_name_collisions)]
+ fn ensure_in_range(&self, range: impl RangeBounds<isize> + Debug) -> Result<()> {
+ if range.contains(&self.value()?) {
+ Ok(())
+ } else {
+ error!(self.span(), "value must be in range {:?}", range)
+ }
+ }
+
+ fn value<T: FromStr + Display>(&self) -> Result<T>
+ where
+ T::Err: Display,
+ {
+ match self.base10_parse() {
+ Ok(value) => Ok(value),
+ Err(e) => error!(self.span(), "{}", e),
+ }
+ }
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..ce3f4d2
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,95 @@
+#![forbid(unsafe_code)]
+#![deny(
+ anonymous_parameters,
+ rust_2018_idioms,
+ trivial_casts,
+ trivial_numeric_casts,
+ unreachable_pub,
+ const_err,
+ illegal_floating_point_literal_pattern,
+ late_bound_lifetime_arguments,
+ path_statements,
+ patterns_in_fns_without_body,
+ clippy::all
+)]
+#![warn(
+ unused_extern_crates,
+ missing_copy_implementations,
+ missing_debug_implementations,
+ single_use_lifetimes,
+ unused_qualifications,
+ variant_size_differences,
+ clippy::pedantic,
+ clippy::nursery,
+ clippy::decimal_literal_representation,
+ clippy::get_unwrap,
+ clippy::option_unwrap_used,
+ clippy::print_stdout,
+ clippy::result_unwrap_used
+)]
+#![allow(
+ clippy::inline_always,
+ clippy::cast_possible_wrap,
+ clippy::cast_lossless,
+ clippy::module_name_repetitions,
+ clippy::must_use_candidate,
+ clippy::use_self, // Not supported in some situations in older compilers.
+)]
+
+// This is required on rustc < 1.42.0.
+#[allow(unused_extern_crates)]
+extern crate proc_macro;
+
+macro_rules! error {
+ ($message:literal) => {
+ error!(::proc_macro2::Span::call_site(), $message)
+ };
+
+ ($span:expr, $message:literal) => {
+ Err(::syn::Error::new($span, $message))
+ };
+
+ ($span:expr, $($args:expr),+) => {
+ Err(::syn::Error::new($span, format!($($args),+)))
+ };
+}
+
+mod kw {
+ use syn::custom_keyword;
+ custom_keyword!(am);
+ custom_keyword!(pm);
+ custom_keyword!(AM);
+ custom_keyword!(PM);
+ custom_keyword!(utc);
+ custom_keyword!(UTC);
+}
+
+mod date;
+mod ext;
+mod offset;
+mod time;
+mod time_crate;
+
+use date::Date;
+use offset::Offset;
+use proc_macro_hack::proc_macro_hack;
+use quote::ToTokens;
+use syn::parse_macro_input;
+use time::Time;
+
+macro_rules! impl_macros {
+ ($($name:ident : $type:ty),* $(,)?) => {
+ $(
+ #[proc_macro_hack]
+ pub fn $name(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+ parse_macro_input!(input as $type).to_token_stream().into()
+ }
+ )*
+ };
+}
+
+impl_macros! {
+ time: Time,
+ offset: Offset,
+ date: Date,
+}
diff --git a/src/offset.rs b/src/offset.rs
new file mode 100644
index 0000000..86fe836
--- /dev/null
+++ b/src/offset.rs
@@ -0,0 +1,80 @@
+use crate::{
+ ext::LitIntExtension,
+ kw::{utc, UTC},
+};
+use proc_macro2::TokenStream;
+use quote::{quote, ToTokens};
+use syn::{
+ parse::{Parse, ParseStream},
+ LitInt, Result, Token,
+};
+
+#[repr(i8)]
+enum Direction {
+ East = 1,
+ West = -1,
+}
+
+pub(crate) struct Offset {
+ pub(crate) offset: i32,
+}
+
+impl Parse for Offset {
+ fn parse(input: ParseStream<'_>) -> Result<Self> {
+ if input.peek(utc) {
+ input.parse::<utc>()?;
+ return Ok(Self { offset: 0 });
+ }
+ if input.peek(UTC) {
+ input.parse::<UTC>()?;
+ return Ok(Self { offset: 0 });
+ }
+
+ let direction = if input.peek(Token![+]) {
+ input.parse::<Token![+]>()?;
+ Direction::East
+ } else if input.peek(Token![-]) {
+ input.parse::<Token![-]>()?;
+ Direction::West
+ } else {
+ return error!("offset must have an explicit sign");
+ };
+
+ let hour = input.parse::<LitInt>()?;
+
+ // Minutes are optional, defaulting to zero.
+ let minute = if input.peek(Token![:]) {
+ input.parse::<Token![:]>()?;
+ input.parse::<LitInt>()?
+ } else {
+ LitInt::create(0)
+ };
+
+ // Seconds are optional, defaulting to zero.
+ let second = if input.peek(Token![:]) {
+ input.parse::<Token![:]>()?;
+ input.parse::<LitInt>()?
+ } else {
+ LitInt::create(0)
+ };
+
+ // Ensure none of the components are out of range.
+ hour.ensure_in_range(0..24)?;
+ minute.ensure_in_range(0..60)?;
+ second.ensure_in_range(0..60)?;
+
+ let offset = direction as i32
+ * (hour.value::<i32>()? * 3_600
+ + minute.value::<i32>()? * 60
+ + second.value::<i32>()?);
+
+ Ok(Self { offset })
+ }
+}
+
+impl ToTokens for Offset {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ let Self { offset } = self;
+ tokens.extend(quote! { ::time::UtcOffset::seconds(#offset) });
+ }
+}
diff --git a/src/time.rs b/src/time.rs
new file mode 100644
index 0000000..b03f21d
--- /dev/null
+++ b/src/time.rs
@@ -0,0 +1,133 @@
+use crate::ext::LitIntExtension;
+use proc_macro2::TokenStream;
+use quote::{quote, ToTokens};
+use syn::{
+ parse::{Parse, ParseStream},
+ LitFloat, LitInt, Result, Token,
+};
+
+#[derive(PartialEq)]
+enum AmPm {
+ Am,
+ Pm,
+}
+
+impl Parse for AmPm {
+ fn parse(input: ParseStream<'_>) -> Result<Self> {
+ use crate::kw::{am, pm, AM, PM};
+ if input.peek(am) {
+ input.parse::<am>()?;
+ Ok(AmPm::Am)
+ } else if input.peek(AM) {
+ input.parse::<AM>()?;
+ Ok(AmPm::Am)
+ } else if input.peek(pm) {
+ input.parse::<pm>()?;
+ Ok(AmPm::Pm)
+ } else if input.peek(PM) {
+ input.parse::<PM>()?;
+ Ok(AmPm::Pm)
+ } else {
+ error!("expected am or pm")
+ }
+ }
+}
+
+pub(crate) struct Time {
+ pub(crate) hour: LitInt,
+ pub(crate) minute: LitInt,
+ pub(crate) second: LitInt,
+ pub(crate) nanosecond: LitInt,
+}
+
+impl Parse for Time {
+ fn parse(input: ParseStream<'_>) -> Result<Self> {
+ let mut hour = input.parse::<LitInt>()?;
+ input.parse::<Token![:]>()?;
+ let minute = input.parse::<LitInt>()?;
+
+ // Seconds and nanoseconds are optional, defaulting to zero.
+ let (second, nanosecond) = if input.peek(Token![:]) {
+ input.parse::<Token![:]>()?;
+
+ if input.peek(LitFloat) {
+ let float = input.parse::<LitFloat>()?;
+
+ // Temporary value to satisfy the compiler.
+ let float_str = float.to_string();
+ let parts: Vec<_> = float_str.splitn(2, '.').collect();
+
+ let seconds = LitInt::new(parts[0], float.span());
+ let nanoseconds = {
+ // Prepend a zero to avoid having an empty string.
+ // Strip the suffix to avoid syn thinking it's a float.
+ let raw_padded = format!("0{}", parts[1].trim_end_matches(float.suffix()));
+
+ // Take an extra digit due to the padding.
+ let digits: String = raw_padded
+ .chars()
+ .filter(char::is_ascii_digit)
+ .take(10)
+ .collect();
+
+ // Scale the value based on how many digits were provided.
+ #[allow(clippy::cast_possible_truncation)]
+ let value = LitInt::new(&digits, float.span()).base10_parse::<usize>()?
+ * 10_usize.pow(10 - digits.len() as u32);
+
+ LitInt::create(value).with_span(float.span())
+ };
+
+ (seconds, nanoseconds)
+ } else {
+ (input.parse::<LitInt>()?, LitInt::create(0))
+ }
+ } else {
+ (LitInt::create(0), LitInt::create(0))
+ };
+
+ let am_pm = input.parse::<AmPm>().ok();
+
+ // Ensure none of the components are out of range.
+ match am_pm {
+ Some(am_pm) => {
+ hour.ensure_in_range(1..=12)?;
+ // Adjust the hour if necessary.
+ hour = match (hour.value()?, am_pm) {
+ (12, AmPm::Am) => LitInt::create(0).with_span(hour.span()),
+ (value, AmPm::Pm) if value != 12 => {
+ LitInt::create(value + 12).with_span(hour.span())
+ }
+ _ => hour,
+ }
+ }
+ None => hour.ensure_in_range(0..24)?,
+ }
+ minute.ensure_in_range(0..60)?;
+ second.ensure_in_range(0..60)?;
+ // This likely isn't necessary, but it can't hurt.
+ nanosecond.ensure_in_range(0..1_000_000_000)?;
+
+ Ok(Self {
+ hour,
+ minute,
+ second,
+ nanosecond,
+ })
+ }
+}
+
+impl ToTokens for Time {
+ fn to_tokens(&self, tokens: &mut TokenStream) {
+ let Self {
+ hour,
+ minute,
+ second,
+ nanosecond,
+ } = self;
+
+ tokens.extend(quote! {
+ ::time::internals::Time::from_hms_nanos_unchecked(#hour, #minute, #second, #nanosecond)
+ });
+ }
+}
diff --git a/src/time_crate/date.rs b/src/time_crate/date.rs
new file mode 100644
index 0000000..981630e
--- /dev/null
+++ b/src/time_crate/date.rs
@@ -0,0 +1,147 @@
+use super::Weekday::{self, Friday, Monday, Saturday, Sunday, Thursday, Tuesday, Wednesday};
+#[allow(unused_imports)]
+use standback::prelude::*;
+
+fn is_leap_year(year: i32) -> bool {
+ (year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0))
+}
+
+pub(crate) fn days_in_year(year: i32) -> u16 {
+ 365 + is_leap_year(year) as u16
+}
+
+/// The number of days in a month in both common and leap years.
+const DAYS_IN_MONTH_COMMON_LEAP: [[u16; 12]; 2] = [
+ [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
+ [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
+];
+
+#[allow(clippy::cast_possible_truncation)]
+pub(crate) fn days_in_year_month(year: i32, month: u8) -> u8 {
+ DAYS_IN_MONTH_COMMON_LEAP[is_leap_year(year) as usize][month as usize - 1] as u8
+}
+
+pub(crate) fn weeks_in_year(year: i32) -> u8 {
+ let weekday = Date { year, ordinal: 1 }.weekday();
+
+ if (weekday == Thursday) || (weekday == Wednesday && is_leap_year(year)) {
+ 53
+ } else {
+ 52
+ }
+}
+
+pub(crate) struct Date {
+ year: i32,
+ pub(crate) ordinal: u16,
+}
+
+impl Date {
+ pub(crate) const fn as_yo(&self) -> (i32, u16) {
+ (self.year, self.ordinal)
+ }
+
+ pub(crate) fn month_day(&self) -> (u8, u8) {
+ const CUMULATIVE_DAYS_IN_MONTH_COMMON_LEAP: [[u16; 11]; 2] = [
+ [31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334],
+ [31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335],
+ ];
+
+ let days = CUMULATIVE_DAYS_IN_MONTH_COMMON_LEAP[is_leap_year(self.year) as usize];
+ let ordinal = self.ordinal;
+
+ #[allow(clippy::cast_possible_truncation)]
+ {
+ if ordinal > days[10] {
+ (12, (ordinal - days[10]) as u8)
+ } else if ordinal > days[9] {
+ (11, (ordinal - days[9]) as u8)
+ } else if ordinal > days[8] {
+ (10, (ordinal - days[8]) as u8)
+ } else if ordinal > days[7] {
+ (9, (ordinal - days[7]) as u8)
+ } else if ordinal > days[6] {
+ (8, (ordinal - days[6]) as u8)
+ } else if ordinal > days[5] {
+ (7, (ordinal - days[5]) as u8)
+ } else if ordinal > days[4] {
+ (6, (ordinal - days[4]) as u8)
+ } else if ordinal > days[3] {
+ (5, (ordinal - days[3]) as u8)
+ } else if ordinal > days[2] {
+ (4, (ordinal - days[2]) as u8)
+ } else if ordinal > days[1] {
+ (3, (ordinal - days[1]) as u8)
+ } else if ordinal > days[0] {
+ (2, (ordinal - days[0]) as u8)
+ } else {
+ (1, ordinal as u8)
+ }
+ }
+ }
+
+ #[allow(unstable_name_collisions)]
+ pub(crate) fn weekday(&self) -> Weekday {
+ let (month, day) = self.month_day();
+
+ let (month, adjusted_year) = if month < 3 {
+ (month + 12, self.year - 1)
+ } else {
+ (month, self.year)
+ };
+
+ match (day as i32 + (13 * (month as i32 + 1)) / 5 + adjusted_year + adjusted_year / 4
+ - adjusted_year / 100
+ + adjusted_year / 400)
+ .rem_euclid(7)
+ {
+ 0 => Saturday,
+ 1 => Sunday,
+ 2 => Monday,
+ 3 => Tuesday,
+ 4 => Wednesday,
+ 5 => Thursday,
+ 6 => Friday,
+ _ => unreachable!("A value mod 7 is always in the range 0..7"),
+ }
+ }
+
+ pub(crate) fn from_iso_ywd_unchecked(year: i32, week: u8, iso_weekday_number: u8) -> Date {
+ let ordinal = week as u16 * 7 + iso_weekday_number as u16
+ - (Self::from_yo_unchecked(year, 4)
+ .weekday()
+ .iso_weekday_number() as u16
+ + 3);
+
+ if ordinal < 1 {
+ return Self::from_yo_unchecked(year - 1, ordinal + days_in_year(year - 1));
+ }
+
+ let days_in_cur_year = days_in_year(year);
+ if ordinal > days_in_cur_year {
+ Self::from_yo_unchecked(year + 1, ordinal - days_in_cur_year)
+ } else {
+ Self::from_yo_unchecked(year, ordinal)
+ }
+ }
+
+ pub(crate) fn from_ymd_unchecked(year: i32, month: u8, day: u8) -> Date {
+ /// Cumulative days through the beginning of a month in both common and
+ /// leap years.
+ const DAYS_CUMULATIVE_COMMON_LEAP: [[u16; 12]; 2] = [
+ [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334],
+ [0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335],
+ ];
+
+ let ordinal = DAYS_CUMULATIVE_COMMON_LEAP[is_leap_year(year) as usize][month as usize - 1];
+
+ Date {
+ year,
+ ordinal: ordinal + day as u16,
+ }
+ }
+
+ pub(crate) const fn from_yo_unchecked(year: i32, ordinal: u16) -> Date {
+ Date { year, ordinal }
+ }
+}
diff --git a/src/time_crate/mod.rs b/src/time_crate/mod.rs
new file mode 100644
index 0000000..a26cd11
--- /dev/null
+++ b/src/time_crate/mod.rs
@@ -0,0 +1,24 @@
+// Because time (indirectly) depends on this crate, we can't depend on time
+// here. As such, we need to copy the functions over. If/when proc macros can be
+// declared in the same crate, this will no longer be necessary.
+
+mod date;
+
+pub(crate) use date::{days_in_year, days_in_year_month, weeks_in_year, Date};
+
+#[derive(PartialEq)]
+pub(crate) enum Weekday {
+ Monday,
+ Tuesday,
+ Wednesday,
+ Thursday,
+ Friday,
+ Saturday,
+ Sunday,
+}
+
+impl Weekday {
+ pub(crate) const fn iso_weekday_number(self) -> u8 {
+ self as u8 + 1
+ }
+}